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《工程(英文)》 >> 2018年 第4卷 第6期 doi: 10.1016/j.eng.2018.10.005

用于牙模三维重构的双平台激光扫描仪

State Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an 710049, China

收稿日期: 2018-05-02 修回日期: 2018-09-29 录用日期: 2018-10-29 发布日期: 2018-11-03

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摘要

本文研究开发了一种用于牙模三维(3D)重建的双平台激光扫描仪,结合平移和旋转平台用于实现对被测物的完整扫描。提出了一种自动标定法,通过设计一个阶梯状标定靶进行平移标定,再通过一个辅助图案完成旋转标定,整个过程只需要放置标定块和粘贴辅助图案,其他步骤编程完成,简化标定步骤;提出了一种神经网络混合模型的标定算法,将有模型标定法和直接标定法相结合,实现高精度标定。通过实验对本系统及所提出的标定方法的有效性进行了验证,并将其应用于典型牙模的测量。结果表明,研究开发的扫描仪可以应用于牙模以及工程领域中不规则物体形貌的3D测量。

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